RT Journal Article SR Electronic T1 Obesity-related hypogonadism: a reversible condition JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr-2017-220416 DO 10.1136/bcr-2017-220416 VO 2017 A1 Stamatios Zouras A1 Jeffrey W Stephens A1 David Price YR 2017 UL http://casereports.bmj.com/content/2017/bcr-2017-220416.abstract AB Obesity is associated with hypogonadism. While this association is widely accepted, the underlying mechanisms remain unclear. Furthermore, obesity is a risk factor for hypogonadism and conversely hypogonadism may be a risk factor for obesity. We present the case of a morbidly obese man aged 30 years with hypogonadotrophic hypogonadism that underwent a Roux-en-Y gastric bypass operation. Following the surgical treatment of his obesity, the testosterone level returned to normal with improvements in hypogonadal symptoms, which allowed discontinuation of exogenous testosterone therapy. This case report demonstrates reversal of hypogonadism following weight loss with restoration of gonadal function.